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<pre><span class="sourceLineNo">001</span><a name="line.1"></a>
<span class="sourceLineNo">002</span>/*<a name="line.2"></a>
<span class="sourceLineNo">003</span> * Copyright (C) 2014 Archie L. Cobbs. All rights reserved.<a name="line.3"></a>
<span class="sourceLineNo">004</span> *<a name="line.4"></a>
<span class="sourceLineNo">005</span> * $Id: CompositeIndex.html 842 2015-03-07 18:20:42Z archie.cobbs $<a name="line.5"></a>
<span class="sourceLineNo">006</span> */<a name="line.6"></a>
<span class="sourceLineNo">007</span><a name="line.7"></a>
<span class="sourceLineNo">008</span>package org.jsimpledb.core;<a name="line.8"></a>
<span class="sourceLineNo">009</span><a name="line.9"></a>
<span class="sourceLineNo">010</span>import com.google.common.base.Function;<a name="line.10"></a>
<span class="sourceLineNo">011</span>import com.google.common.collect.Lists;<a name="line.11"></a>
<span class="sourceLineNo">012</span><a name="line.12"></a>
<span class="sourceLineNo">013</span>import java.util.Collections;<a name="line.13"></a>
<span class="sourceLineNo">014</span>import java.util.List;<a name="line.14"></a>
<span class="sourceLineNo">015</span><a name="line.15"></a>
<span class="sourceLineNo">016</span>/**<a name="line.16"></a>
<span class="sourceLineNo">017</span> * Represents a composite index on an {@link ObjType}.<a name="line.17"></a>
<span class="sourceLineNo">018</span> */<a name="line.18"></a>
<span class="sourceLineNo">019</span>public class CompositeIndex extends SchemaItem {<a name="line.19"></a>
<span class="sourceLineNo">020</span><a name="line.20"></a>
<span class="sourceLineNo">021</span>    final ObjType objType;<a name="line.21"></a>
<span class="sourceLineNo">022</span>    final List&lt;SimpleField&lt;?&gt;&gt; fields;<a name="line.22"></a>
<span class="sourceLineNo">023</span><a name="line.23"></a>
<span class="sourceLineNo">024</span>    /**<a name="line.24"></a>
<span class="sourceLineNo">025</span>     * Constructor.<a name="line.25"></a>
<span class="sourceLineNo">026</span>     *<a name="line.26"></a>
<span class="sourceLineNo">027</span>     * @param name the name of the index<a name="line.27"></a>
<span class="sourceLineNo">028</span>     * @param storageId index storage ID<a name="line.28"></a>
<span class="sourceLineNo">029</span>     * @param schema schema version<a name="line.29"></a>
<span class="sourceLineNo">030</span>     * @param objType containing object type<a name="line.30"></a>
<span class="sourceLineNo">031</span>     * @param fields indexed fields<a name="line.31"></a>
<span class="sourceLineNo">032</span>     * @throws IllegalArgumentException if any parameter is null<a name="line.32"></a>
<span class="sourceLineNo">033</span>     * @throws IllegalArgumentException if {@code name} is invalid<a name="line.33"></a>
<span class="sourceLineNo">034</span>     * @throws IllegalArgumentException if {@code storageId} is non-positive<a name="line.34"></a>
<span class="sourceLineNo">035</span>     */<a name="line.35"></a>
<span class="sourceLineNo">036</span>    CompositeIndex(String name, int storageId, Schema schema, ObjType objType, Iterable&lt;? extends SimpleField&lt;?&gt;&gt; fields) {<a name="line.36"></a>
<span class="sourceLineNo">037</span>        super(name, storageId, schema);<a name="line.37"></a>
<span class="sourceLineNo">038</span>        if (objType == null)<a name="line.38"></a>
<span class="sourceLineNo">039</span>            throw new IllegalArgumentException("null objType");<a name="line.39"></a>
<span class="sourceLineNo">040</span>        if (fields == null)<a name="line.40"></a>
<span class="sourceLineNo">041</span>            throw new IllegalArgumentException("null fields");<a name="line.41"></a>
<span class="sourceLineNo">042</span>        this.objType = objType;<a name="line.42"></a>
<span class="sourceLineNo">043</span>        this.fields = Collections.unmodifiableList(Lists.newArrayList(fields));<a name="line.43"></a>
<span class="sourceLineNo">044</span>    }<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span>// Public methods<a name="line.46"></a>
<span class="sourceLineNo">047</span><a name="line.47"></a>
<span class="sourceLineNo">048</span>    /**<a name="line.48"></a>
<span class="sourceLineNo">049</span>     * Get the containing object type.<a name="line.49"></a>
<span class="sourceLineNo">050</span>     *<a name="line.50"></a>
<span class="sourceLineNo">051</span>     * @return indexed object type<a name="line.51"></a>
<span class="sourceLineNo">052</span>     */<a name="line.52"></a>
<span class="sourceLineNo">053</span>    public ObjType getObjType() {<a name="line.53"></a>
<span class="sourceLineNo">054</span>        return this.objType;<a name="line.54"></a>
<span class="sourceLineNo">055</span>    }<a name="line.55"></a>
<span class="sourceLineNo">056</span><a name="line.56"></a>
<span class="sourceLineNo">057</span>    /**<a name="line.57"></a>
<span class="sourceLineNo">058</span>     * Get the indexed fields.<a name="line.58"></a>
<span class="sourceLineNo">059</span>     *<a name="line.59"></a>
<span class="sourceLineNo">060</span>     * @return list of indexed fields, always having length two or greater<a name="line.60"></a>
<span class="sourceLineNo">061</span>     */<a name="line.61"></a>
<span class="sourceLineNo">062</span>    public List&lt;SimpleField&lt;?&gt;&gt; getFields() {<a name="line.62"></a>
<span class="sourceLineNo">063</span>        return this.fields;<a name="line.63"></a>
<span class="sourceLineNo">064</span>    }<a name="line.64"></a>
<span class="sourceLineNo">065</span><a name="line.65"></a>
<span class="sourceLineNo">066</span>    @Override<a name="line.66"></a>
<span class="sourceLineNo">067</span>    public String toString() {<a name="line.67"></a>
<span class="sourceLineNo">068</span>        return "composite index `" + this.name + "' on fields " + Lists.transform(this.fields,<a name="line.68"></a>
<span class="sourceLineNo">069</span>          new Function&lt;SimpleField&lt;?&gt;, String&gt;() {<a name="line.69"></a>
<span class="sourceLineNo">070</span>            @Override<a name="line.70"></a>
<span class="sourceLineNo">071</span>            public String apply(SimpleField&lt;?&gt; field) {<a name="line.71"></a>
<span class="sourceLineNo">072</span>                return field.name;<a name="line.72"></a>
<span class="sourceLineNo">073</span>            }<a name="line.73"></a>
<span class="sourceLineNo">074</span>        });<a name="line.74"></a>
<span class="sourceLineNo">075</span>    }<a name="line.75"></a>
<span class="sourceLineNo">076</span><a name="line.76"></a>
<span class="sourceLineNo">077</span>// Non-public methods<a name="line.77"></a>
<span class="sourceLineNo">078</span><a name="line.78"></a>
<span class="sourceLineNo">079</span>    @Override<a name="line.79"></a>
<span class="sourceLineNo">080</span>    CompositeIndexStorageInfo toStorageInfo() {<a name="line.80"></a>
<span class="sourceLineNo">081</span>        return new CompositeIndexStorageInfo(this);<a name="line.81"></a>
<span class="sourceLineNo">082</span>    }<a name="line.82"></a>
<span class="sourceLineNo">083</span>}<a name="line.83"></a>
<span class="sourceLineNo">084</span><a name="line.84"></a>




























































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